Steel alloy



Patented Feb. 19, 1935 UNITED STATES PATENT OFFICE either separately orin and up to .7% carbon.

portion of either si chromium, molybden STEEL ALLOY Adolf Fry, Essen,Germany, asslgnor to The vltylltralloy Corporation, a corporation ofDelaare No Drawing. Application August 15, 1931,

' Serial No. 557,368

and from 4 to 8% of silicon, molybdenum,

titanium or any desired 0 In other wor licon, mangan um, tungsten,

zirconium, ombination, (is, the proes vanadium,

substantially all iron.

3. hardened surface and consisting 01' a steel alloy titanium 'orzirconium may amount to between 4 to 8 elements other. than aluminiumand carbon will amount to from 4 to 8%. In general, it is prei'erable tovary the proportion of with relation to alloying elements. When thetotal percentage of the other of the product.

invention may 0.30% carbon, 0.52% silicon, 1 f1s% man- 0.34% carbon,0.32% silicon, 0.49% man- An article of manufacture having a nitridesurface and consisting of a steel alloy 30 4% but not exceeding about 8%.01 an element selected from the group consisting of silicon, manganese,nickel, chromium, molybdenum, tungsten, vanadium, titanium andzirconium, with the balance substantially all iron.

2. hardened surface An article of An article of manufacture having anitride

